Rocket Lab’s first launch of the year lifted off Thursday at 7:27 p.m. EDT (2327 GMT) after a four-day delay to replace a video transmitter and wait for improved weather. The company’s Electron rocket launched from Mahia Peninsula on New Zealand’s North Island with a technology demonstration satellite for DARPA, the U.S. military research and development agency.

United Launch Alliance and SpaceX recently won contracts worth $739 million to send six missions into orbit for the U.S. military, and the Air Force has announced a new title for its flagship launcher program, dropping “expendable” from the name in a new era of reusable rockets.

Russian commander Alexey Ovchinin, NASA co-pilot Nick Hague and astronaut Christina Koch lifted off aboard a Soyuz rocket Thursday from the Baikonur Cosmodrome in Kazakhstan, heading for the International Space Station to raise the research outpost’s crew complement back to six. The Soyuz booster launched at 1914 GMT (3:14 p.m. EDT), and docking at the space station occurred at 0101 GMT (9:01 p.m. EDT).